Publications by authors named "R Aich"
Bacteria containing ice-nucleating proteins (INPs) evolved in nature to nucleate ice at the high sub-zero ambiance. The ability of the INPs to induce order in the hydration layer and their aggregation propensity appear to be key factors of their ice nucleation abilities. However, the mechanism of the process of ice nucleation by INPs is yet to be understood clearly.
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- The study investigates how antifreeze proteins (AFPs) inhibit ice growth by comparing a moderately active type III AFP and a hyperactive spruce budworm AFP, using molecular dynamics simulations.
- The results indicate that ice surface coverage is crucial for ice growth inhibition; higher coverage leads to stronger binding between AFPs and ice due to multiple hydrogen bonds.
- In low AFP concentration scenarios, AFPs can act like impurities instead, getting trapped in the growing ice crystal rather than preventing its growth.
Sudden cardiac death affects close to half a million people a year in Europe and accounts for 50 % of cardiovascular deaths. Unfortunately, only a minority of these events occur in front of witnesses, which reduces the chances of survival. In order to limit this risk, an internal automatic defibrillator can be implanted in patients at risk of sudden cardiac death.
View Article and Find Full Text PDFDielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets.
Nanomaterials (Basel)
November 2021
Owing to their flexible chemical synthesis and the ability to shape nanostructures, lead halide perovskites have emerged as high potential materials for optoelectronic devices. Here, we investigate the excitonic band edge states and their energies levels in colloidal inorganic lead halide nanoplatelets, particularly the influence of dielectric effects, in a thin quasi-2D system. We use a model including band offset and dielectric confinements in the presence of Coulomb interaction.
View Article and Find Full Text PDFObjectives: To evaluate the role of CT Perfusion in Identifying the core and the potentially salvageable penumbra in brain infarcts by observing perfusion maps (CBV, CBF and MTT). Also to identify patients who would benefit from reperfusion therapy and to evaluate the feasibility of identifying the penumbra on noncontrast CT vide comparison with perfusion maps.
Materials And Methods: A prospective study of 50 patients who presented with acute onset neurological deficit within 6 hours of symptom onset and in whom initial NCCT revealed no evidence of cerebral hemorrhage; evaluated with CT Perfusion was done at tertiary care center in 1 calender year 2014.